[quote=Simplicity]
And question-are social classes dependent on the job you get? Or are they inherited (parents were omega, I'm omega sort of deal)?
[/quote]

The class is dependent on the job you're assigned, but most often if your parents are in one class, you'll end up in the same one because intelligence seems to be genetic (at least in part). Occasionally there are intellectual anomalies where a child ends up moving up or down the caste system, though, so don't take that as a rule.